Light propagation in two-dimensional cold atomic clouds with positional correlations

2019 ◽  
Author(s):  
Boxiang Wang ◽  
Changying Zhao
Keyword(s):  
Light Propagation ◽  
Two Dimensional

Two-dimensional Bi2S3-based all-optical photonic devices with strong nonlinearity due to spatial self-phase modulation

Nanophotonics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 2225-2234
Author(s):  
Youxian Shan ◽  
Zhongfu Li ◽  
Banxian Ruan ◽  
Jiaqi Zhu ◽  
Yuanjiang Xiang ◽  
...  
Keyword(s):  
Phase Modulation ◽  
Light Propagation ◽  
Photonic Devices ◽  
Potential Candidate ◽  
Strong Nonlinearity ◽  
Two Dimensional ◽  
Incident Wavelength ◽  
Saturated Absorption ◽  
Self Phase Modulation ◽  
All Optical

AbstractBismuth sulfide (Bi2S3) is a binary chalcogenide semiconductor compound that has received much attention in optoelectronic devices because of its stratified structure. In this work we showed that the two-dimensional (2D) Bi2S3 shows strong nonlinearity using spatial self-phase modulation and that the all-optical photonic devices, e.g. the all-optical switches and all-optical diodes, have been demonstrated experimentally by observing the nonlinear behavior of the diffraction rings. In addition, an all-optical diode is designed in this work using combined structure with 2D Bi2S3/SnS2 nanosheet by taking advantage of the reverse saturated absorption of 2D SnS2 and saturated absorption of 2D Bi2S3. Nonreciprocal light propagation has been achieved with different incident wavelength and a variety of incident intensities. Those characteristics make 2D Bi2S3 a potential candidate for the next generation nonreciprocal all-optical device.

A Two-Dimensional Photonic Crystal Structure for Improving Efficiency of Pbs Quantum Dots Electroluminescence Devices

2012 ◽  
Vol 529 ◽  
pp. 14-18
Author(s):  
Pei Liu ◽  
Xiao Song Zhang ◽  
Chuan Zhen Xin ◽  
Meng Zhen Li ◽  
Lan Li
Keyword(s):  
Quantum Dots ◽  
Photonic Crystal ◽  
Light Propagation ◽  
Photonic Band Gap ◽  
Gap Effect ◽  
Diffraction Effect ◽  
Two Dimensional ◽  
Two Dimensional Photonic Crystal ◽  
Pbs Quantum Dots ◽  
Photonic Band

In this research, a triangular two-dimensional (2D) photonic crystal (PC) was hypothetically introduced into the active layer of a PbS quantum dots (QDs) electroluminescent (EL) device. The attributes of the photonic band gap effect and diffraction effect were considered and evaluated for device performance improvement. We designed and optimized the 2D-PC structure parameters to enhance the emission intensity at wavelength 1124 nm. The optimal structure parameter of PC is determined by normalized radius of r/a=0.49 and lattice constant of a=540 nm when the thickness of PC slab h is 74 nm. The 3D stimulation view of light propagation validates and supports the proposed strategy. The results provide a theoretical prediction for ideal PbS QDs-based EL device.

scholarly journals Linear and nonlinear discrete light propagation in weakly modulated large-area two-dimensional photonic lattice slab in LiNbO_3:Fe crystal

2009 ◽  
Vol 17 (25) ◽  
pp. 23078 ◽  
Author(s):  
Xinyuan Qi ◽  
Guoquan Zhang ◽  
Ningning Xu ◽  
Yiling Qi ◽  
Bin Han ◽  
...  
Keyword(s):  
Light Propagation ◽  
Two Dimensional ◽  
Large Area ◽  
Linear And Nonlinear
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